About Ray Roberts Lake
Sources for characteristics are linked from the characteristic's value. Conservation pool elevation datum is NGVD29.
| Impoundment Year | 1969 |
| Drainage Area | 692 mi2 |
| Capacity | 788,167 acre-ft |
| Conservation Pool Elevation | 632 ft |
| Counties | Cooke, Denton, Grayson |
| Primary Uses | Water Supply , Recreation |
| Additional Resources |
Texas Parks and Wildlife - Ray Roberts Lake Water Data for Texas - Ray Roberts Lake Texas Water Development Board - Ray Roberts Lake US Army Corps of Engineers - Ray Roberts Lake Levels |
Texas Parks and Wildlife Status: Infested
The water body has an established, reproducing population of zebra mussels.
Lake Map
Blue triangles show USGS data-collection locations.
| Most Recent Detection | First Date Detected | |
|---|---|---|
| 09/18/2023 | 0.04 per Liter | 10/24/2011 |
Larvae detection counts are averaged across all sampling sites.
Zebra mussels typically spawn in the spring and autumn as microscopic, free swimming larvae called 'veligers'. The USGS uses fine mesh nets to sample for larvae during the spawning season.
| Most Recent Detection | First Date Detected | |
|---|---|---|
| 09/18/2023 | 06/05/2012 | |
Adult detection counts are averaged across all sampling sites.
At the end of their larval stage, zebra mussels attach to a substrate and metamorphose into juveniles. The USGS conducts both visual and SCUBA inspections, and deploys artificial substrates as passive samplers, to get a estimate of the juvenile and adult zebra mussel populations.
Water-quality monitoring is important for studies of zebra mussel survival, growth, and reproduction. Water-quality data are also important for risk assessments for zebra mussel infestation.
Water-Quality Graphs
Select a parameter to view graphs of data collected at all Ray Roberts Lake sites.
Select a site to view all water-quality data in the USGS National Water Information System (NWIS).